You will find uploads of the Eisenhorn Omnibus on YouTube or the Internet Archive. However, these are often user-uploaded, low-quality, or get taken down by copyright strikes (Games Workshop is notoriously protective).
Dan Abnett’s Eisenhorn trilogy ( Xenos , Malleus , Hereticus ) is the gold standard for Warhammer 40,000 fiction. It follows Gregor Eisenhorn, an Imperial Inquisitor, as he hunts heretics and daemons — slowly becoming the very thing he fights against. It’s smart, dark, and character-driven. eisenhorn omnibus free audiobook top